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- W2783011224 abstract "Abstract Present work mainly deals with two important aspects of co-doped ceria based solid electrolytes. First, the occurrence of micro-strain or structural distortions in ceria lattice on doping of Dy3+ and Ca2+ at the place of Ce4+. Second, an enhancement in electrical conductivity by formation of nano-composites of Ce0.83Dy0.14Ca0.03O1.90 (CDC) and eutectic mixture of sodium and lithium carbonates [(Li0.52Na0.48)2CO3] (LNCO). CDC ceramic powder was synthesized by citrate-nitrate auto-combustion route. Nano-composites were prepared by mixing the CDC powder with LNCO using a ball mill. X-ray diffraction studies were carried out to analyze the crystal structure of CDC and to study the amorphous nature of carbonates in the nanocomposites. Thermal behavior of the nanocomposites was studied by differential scanning calorimetry (DSC). XRD data of CDC were refined by Rietveld analysis to determine the lattice parameters, atomic positions, bond lengths, bond angles, oxygen deficiency and possible micro-strain. Microstructures of the specimens were studied using scanning electron microscope. Electrical conductivity of the nanocomposites was investigated by using complex plane impedance analysis. A significant improvement in electrical conductivity was observed in nanocomposites with varying concentration of carbonates. Maximum conductivity, 1.05 × 10−1 S cm−1 at 500 °C, was observed in the composite with 30 wt% (CDC/30LNCO) of carbonates content." @default.
- W2783011224 created "2018-01-26" @default.
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- W2783011224 date "2018-04-01" @default.
- W2783011224 modified "2023-09-24" @default.
- W2783011224 title "Structural analysis of Ce0.83Dy0.14Ca0.03O1.90 (CDC) and enhanced electrical conductivity of its composites with alkali carbonates for LT-SOFCs" @default.
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- W2783011224 doi "https://doi.org/10.1016/j.jallcom.2018.01.128" @default.
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